Back when I had Adelphia the HD quality from the antenna was better than the HD quality over cable, for 2, 4 and 7.
My problem right now is on windy days I get signal dropout from Fox, and on really windy days from CBS. My antenna is just a pair of rabbit ears in the attic, so I know they’re not moving. I ordered a Silver Sensor antenna last week so hopefully when that comes in it will take care of the problem. Everyone who’s using that antenna for OTA HD loves it.